3L Water Capacity: The Air humidifier has at least 3 Liters of water for over 24 hours operating time. It is able to humidify the air in rooms up to 10-30 m²/ 107-322 ft² like for bedroom, living room, nursery, office etc. Ultrasonic Mist Working: The humidifier provides the range of mist output: 100ml/h-280ml/h. Adjusting the mist output by the knob easily. More effective mist output can provide higher quality of air humidifying. Convenient Use Design: The cool mist humidifier has the visible water tank which can monitor the water volume at the real time. The design of adding water above is easier to utilize the humidifier. The tank is convenient to clean due to the visible design. Essential Oil Setting & Lower Noise: The aroma diffuser port is in the bottom side of the humidifier. Adding the essential oil directly and operating the air humidifier with aroma mist. The noise of humidifier is less than 36dB which cannot influence the daily life. It is favorable and suitable gifts for family members, friends or colleagues.